package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrdersMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.OrdersService;
import com.sky.service.ReportService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Resource
    private OrdersMapper ordersMapper;

    @Resource
    private UserMapper userMapper;

    @Resource
    private OrdersService ordersService;


    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        ArrayList<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        while(!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 存放每天的营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            // 查询date日期对应的营业额数据，营业额是指：状态为“已完成”的订单金额合计
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);


            // select sum(amount) from orders where order_time > ? and order_time < ? and status = 5
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = ordersMapper.sumByMap(map);
            turnoverList.add(turnover == null ? 0.0 : turnover);
        }


        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        ArrayList<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        while(!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }


        // select count(id) from user where create_time > ? and create_time < ?
        List<Integer> newUserList = new ArrayList<>();
        // select count(id from user where create_time <= ?
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);
            Integer total = userMapper.countByMap(map);
            map.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(map);
            totalUserList.add(total == null ? 0 : total);
            newUserList.add(newUser == null ? 0 : newUser);
        }


        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        ArrayList<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        while(!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        Integer all = 0;
        Integer valid = 0;
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            Integer orderCount = ordersMapper.TotleByMapInteger(map);
            map.put("status", Orders.COMPLETED);
            Integer validOrderCount = ordersMapper.TotleByMapInteger(map);
            // 所有订单
            all += orderCount;
            // 有效订单
            valid += validOrderCount;
            orderCountList.add(orderCount == null ? 0 : orderCount);
            validOrderCountList.add(validOrderCount == null ? 0 : validOrderCount);
        }

        Double orderCompletionRate = valid * 1.0 / all;

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .orderCompletionRate(orderCompletionRate)
                .totalOrderCount(all)
                .validOrderCount(valid)
                .build();
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        // select od.name, sum(od.number) from order_detail od, orders o where od.order_id = o.id and o.order_time > ? and o.order_time < ? group by od.name order by sum(od.number) desc limit 0,10
        List<GoodsSalesDTO> salesTop10 = ordersMapper.getSalesTop10(beginTime, endTime);

        List<String> nameList = new ArrayList<>();
        List<Integer> numberList = new ArrayList<>();
        for (GoodsSalesDTO goodsSalesDTO : salesTop10) {
            String name = goodsSalesDTO.getName();
            Integer number = goodsSalesDTO.getNumber();

            nameList.add(name);
            numberList.add(number);
        }

//        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());

        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList, ","))
                .numberList(StringUtils.join(numberList, ","))
                .build();
    }

    /**
     * 1、查数据
     * 2、操作POI
     * 3、输出流写出文件
     * @param response
     */
    @Override
    public void exportBusnessDate(HttpServletResponse response) {
        // 1、查询数据库，获取营业数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        // 查询概览数据
        BusinessDataVO businessDataVO = ordersService.businessData(dateBegin, dateEnd);
        // 2、通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            // 基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            // 获取表格文件的sheet页
            XSSFSheet sheet = excel.getSheet("sheet1");

            // 填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            // 获取第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            // 获取第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());


            // 填充明细数据
            for(int i = 0; i < 30; i ++ ) {
                LocalDate date = dateBegin.plusDays(i);
                // 查询某一天的数据
                BusinessDataVO business = ordersService.businessData(date, date);

                // 获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(business.getTurnover());
                row.getCell(3).setCellValue(business.getValidOrderCount());
                row.getCell(4).setCellValue(business.getOrderCompletionRate());
                row.getCell(5).setCellValue(business.getUnitPrice());
                row.getCell(6).setCellValue(business.getNewUsers());
            }

            // 3、通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            // 关闭资源
            excel.close();
            in.close();
            out.close();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }



    }
}
